Proceeds from sale of Sunseeker Resort Proceeds from Divestiture of Businesses Number Of Aircraft, Finance Lease Obligation Number Of Aircraft, Finance Lease Obligation Number Of Aircraft, Finance Lease Obligation Special Charges Unusual or Infrequent Items, or Both, Disclosure [Text Block] Interest expense Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Statistical Measurement [Domain] Statistical Measurement [Domain] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Number of aircraft committed to purchase Number Of Aircraft Committed To Purchase Number Of Aircraft Committed To Purchase Restricted cash Restricted Cash, Current Award Timing Predetermined Award Timing Predetermined [Flag] Long-term Debt, Weighted Average Interest Rate, at Point in Time Long-Term Debt, Weighted Average Interest Rate, at Point in Time Asset Class [Axis] Asset Class [Axis] Entity File Number Entity File Number Additional Paid-in Capital Additional Paid-in Capital [Member] Allegiant Air Allegiant Air [Member] Allegiant Air [Member] Measurement of Impairment of Long-Lived Assets, Policy [Policy Text Block] Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Tabular List, Table Tabular List [Table Text Block] Leases [Abstract] Leases [Abstract] Schedule of Dividends Declared Dividends Declared [Table Text Block] New Accounting Pronouncements, Policy [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Finance Lease, Liability [Abstract] Finance Lease, Liability [Abstract] Adjusted weighted-average shares outstanding under treasury stock method (in shares) WeightedAverageNumberofDilutedSharesOutstandingTreasuryStockMethod The average number of shares or units issued and outstanding that are used in calculating diluted EPS, determined based on the timing of issuance of shares in the period under the treasury stock method. Aircraft Type [Domain] Aircraft [Domain] Type of Restructuring [Domain] Type of Restructuring [Domain] Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Unionized Employees Concentration Risk Unionized Employees Concentration Risk [Member] Carrying Value Total debt and finance lease obligations, net of related costs Secured Long-Term Debt, Noncurrent Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Basic (in dollars per share) Earnings Per Share, Basic Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] Related Party Transactions Related Party Transactions Disclosure [Text Block] Share-Based Compensation Arrangement By Share-Based Payment Award, Additional Number Of Shares Authorized Share-Based Compensation Arrangement By Share-Based Payment Award, Additional Number Of Shares Authorized Share-Based Compensation Arrangement By Share-Based Payment Award, Additional Number Of Shares Authorized Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Commercial paper Commercial Paper [Member] Rewards Plan Name [Axis] Rewards Plan Name [Axis] Rewards Plan Name Revenue Recognition Revenue from Contract with Customer [Text Block] Credit Agricole Corporate and Investment Bank Credit Agricole Corporate and Investment Bank [Member] Credit Agricole Corporate and Investment Bank Other Comprehensive Income (Loss), Net of Tax Other Comprehensive Income (Loss), Net of Tax Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Accumulated amortization of other deferred costs Accumulated Amortization of Other Deferred Costs Sunseeker Special Charges Sunseeker Special Charges [Member] Sunseeker Special Charges Total number of shares purchased in year Stock Issued During Period, Shares, Employee Stock Purchase Plans Contract with Customer, Liability, Credit Voucher Bookings Contract with Customer, Liability, Credit Voucher Bookings Contract with Customer, Liability, Credit Voucher Bookings Total current Current Income Tax Expense (Benefit) Adjustment to Compensation, Amount Adjustment to Compensation Amount Other assets/liabilities Increase (Decrease) in Other Operating Assets Unrecognized Share-Based Payment Arrangement, Noncash Expense Unrecognized Share-Based Payment Arrangement, Noncash Expense Unrecognized Share-Based Payment Arrangement, Noncash Expense Share-based compensation expense Share-Based Payment Arrangement, Noncash Expense 2028 Finance Lease, Liability, to be Paid, Year Three Federal Federal Income Tax Expense (Benefit), Continuing Operations Accelerated Depreciation On Airframes Identified For Early Retirement Accelerated Depreciation On Airframes Identified For Early Retirement [Member] Accelerated Depreciation On Airframes Identified For Early Retirement Employee Stock Option Share-Based Payment Arrangement, Option [Member] US Government and agency obligations US Government Corporations and Agencies Securities [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Delayed-Draw Construction Loan Delayed-Draw Construction Loan [Member] Delayed-Draw Construction Loan Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents, Policy [Policy Text Block] Maintenance Technicians Maintenance Technicians [Member] Maintenance Technicians Variable Interest Entity, Primary Beneficiary [Member] Variable Interest Entity, Primary Beneficiary [Member] Effective Income Tax Rate Reconciliation, Percent [Abstract] Effective Income Tax Rate Reconciliation, Percent [Abstract] Sunseeker impairment Asset Impairment Charges TOTAL EQUITY: TOTAL EQUITY Equity, Attributable to Parent Measurement Frequency [Axis] Measurement Frequency [Axis] Insider Trading Policies and Procedures [Line Items] Property, Plant and Equipment Estimated Useful Lives Schedule of Property Plant and Equipment Property, Plant and Equipment [Table Text Block] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Land and buildings/leasehold improvements Land and buildings/leasehold improvements Land and buildings/leasehold improvements CURRENT ASSETS Assets, Current [Abstract] Debt Instrument, Basis Spread on Variable Rate Term Debt Instrument, Basis Spread on Variable Rate Term Debt Instrument, Basis Spread on Variable Rate Term TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY: Liabilities and Equity Fair Value, Measurements, Recurring Fair Value, Recurring [Member] State and Local Jurisdiction State and Local Jurisdiction [Member] Redeveloped Software Restructuring Cost Redeveloped Software Restructuring Cost [Member] Redeveloped Software Restructuring Cost Cover [Abstract] Cover [Abstract] Cash Equivalents Cash and Cash Equivalents, Fair Value Disclosure Acquisition Restructuring Cost Acquisition Restructuring Cost [Member] Acquisition Restructuring Cost Other Deferred Tax Assets, Other Maximum Maximum [Member] Impaired Long-Lived Assets Held and Used by Type [Axis] Impaired Long-Lived Assets Held and Used by Type [Axis] 2028 Purchase Obligation, to be Paid, Year Three Accounting Policies [Abstract] Accounting Policies [Abstract] Participating securities excluded under two-class method (in shares) Participating securities excluded under two-class method Shares excluded in the calculation of Diluted EPS for participating securities under the two-class method. Line of credit facility, expiration period Line of Credit Facility, Expiration Period Concentration Risk Type [Domain] Concentration Risk Type [Domain] Restricted Stock Restricted Stock [Member] Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Internal Use Software, Policy [Policy Text Block] Internal Use Software, Policy [Policy Text Block] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Treasury Stock Treasury Stock, Common [Member] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Computer hardware and software Computer Hardware and Software Computer Hardware and Software Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Total lease obligations Operating Lease, Liability Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Property, plant, and equipment, owned, accumulated depreciation Property, Plant, and Equipment, Owned, Accumulated Depreciation Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Depreciation, Depletion and Amortization, Nonproduction Amortization of assets Finance Lease, Right-of-Use Asset, Amortization INCOME (LOSS) BEFORE INCOME TAXES INCOME (LOSS) BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Loyalty program liability Increase (Decrease) Loyalty Program Liability Increase (Decrease) Loyalty Program Liability Other noncurrent liabilities Other Liabilities, Noncurrent Schedule of Long-Term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Proceeds from sale of property and equipment Proceeds from Sale of Property, Plant, and Equipment Secured Debt By Aircraft, Engines, Other Equipment And Real Estate Secured Debt By Aircraft, Engines, Other Equipment And Real Estate [Member] Secured Debt By Aircraft, Engines, Other Equipment And Real Estate Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Resort Revenue Resort Revenue [Member] Resort Revenue Schedule of Cash Flow, Supplemental Disclosures Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Long-term Debt, Current Maturities Long-Term Debt, Current Maturities Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount 2028 Lessee, Operating Lease, Liability, to be Paid, Year Three Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Disposal Group Name [Domain] Disposal Group Name [Domain] Name Measure Name Secured Debt Secured Debt [Member] Current operating lease liabilities Accrued liabilities Operating Lease, Liability, Current Interest on lease liabilities Finance Lease, Interest Expense Aircraft, engines and related rotable parts Aircraft And Engines [Member] -- None. No documentation exists for this element. -- Deferred income taxes Net deferred tax liabilities Deferred Income Tax Liabilities, Net Document Fiscal Period Focus Document Fiscal Period Focus Receivable [Policy Text Block] Receivable [Policy Text Block] Unsecured Debt Unsecured Debt [Member] Award Timing Method Award Timing Method [Text Block] Award Type [Axis] Award Type [Axis] Income Tax Contingency [Table] Income Tax Contingency [Table] TOTAL ASSETS: Assets Assets Investment, Name [Domain] Investment, Name [Domain] Schedule of Nonvested Restricted Stock Units Activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Share-based Payment Arrangement [Policy Text Block] Share-Based Payment Arrangement [Policy Text Block] Trading Symbol Trading Symbol 2029 Lessee, Operating Lease, Liability, to be Paid, Year Four Capitalized interest Capitalized Interest Cost Capitalized Interest Cost Vested, weighted average grant date fair value (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Income Tax, Policy [Policy Text Block] Income Tax, Policy [Policy Text Block] Common Stocks, Including Additional Paid in Capital Share-Based Compensation, Par Value Amount Share-Based Compensation, Par Value Amount Entity Address, City or Town Entity Address, City or Town OPERATING ACTIVITIES: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Finance Lease, Weighted Average Discount Rate, Percent Finance Lease, Weighted Average Discount Rate, Percent Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent Earnings (loss) per share to common shareholders: Earnings per share to common stockholders: [Abstract] -- None. No documentation exists for this element. -- Concentration Risk Type [Axis] Concentration Risk Type [Axis] Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] OPERATING REVENUES: OPERATING REVENUE: [Abstract] -- None. No documentation exists for this element. -- Entity Emerging Growth Company Entity Emerging Growth Company 2028 Long-Term Debt, Maturity, Year Three 2026 Finance Lease, Liability, to be Paid, Year One Unusual or Infrequent Items, or Both [Abstract] Cash dividends declared per share (in dollars per share) Cash dividends (per Share) Common Stock, Dividends, Per Share, Declared Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Share-Based Compensation Arrangement By Share-Based Payment Award, Increase (Decrease) Restricted Stock Capacity Share-Based Compensation Arrangement By Share-Based Payment Award, Increase (Decrease) Restricted Stock Capacity Share-Based Compensation Arrangement By Share-Based Payment Award, Increase (Decrease) Restricted Stock Capacity Finance Lease, Weighted Average Remaining Lease Term Finance Lease, Weighted Average Remaining Lease Term Right-of-use (ROU) assets acquired Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Repayments of Lines of Credit Repayments of Lines of Credit Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Debt Issuance Costs, Net Debt Issuance Costs, Net Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Business Combination [Domain] Business Combination [Domain] Less imputed interest Finance Lease, Liability, Undiscounted Excess Amount Common stock, shares, outstanding (in shares) Common stock, shares, outstanding (in shares) Common Stock, Shares, Outstanding Schedule of Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Property, Plant and Equipment, Policy [Policy Text Block] Property, Plant and Equipment, Policy [Policy Text Block] PEO PEO [Member] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Changes in certain assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Deferred major maintenance, net of accumulated amortization of $170,226 and $165,333 Deferred Maintenance Costs, Net, Noncurrent Deferred maintenance costs, net, noncurrent. Employee Benefit Plans [Abstract] Employee Benefit Plans [Abstract] Employee Benefit Plans [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Deferred Costs for Heavy Maintenance Deferred Costs for Heavy Maintenance Deferred Costs for Heavy Maintenance Depreciation Deferred Tax Liabilities, Property, Plant and Equipment Rewards Plan Name [Domain] Rewards Plan Name [Domain] Rewards Plan Name [Domain] Retained Earnings Retained Earnings [Member] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT BEGINNING OF PERIOD CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT END OF PERIOD Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] INCOME TAX PROVISION (BENEFIT) Total income tax provision (benefit) Income Tax Expense (Benefit) OTHER (INCOME) EXPENSES: OTHER (INCOME) EXPENSE: [Abstract] -- None. No documentation exists for this element. -- Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Product and Service [Domain] Product and Service [Domain] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Total property and equipment Property, Plant and Equipment, Gross Parent Parent [Member] NET INCOME (LOSS) Net Income Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Business Combination [Table] Business Combination [Table] Employee Employee [Member] Employee [Member] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Resort and other Other revenue Other operating revenue not otherwise defined in the taxonomy, primarily generated from aircraft and flight equipment leased to third parties. Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Preopening Expense Preopening Expense Preopening Expense City Area Code City Area Code Number Of Business Unit Number Of Business Unit Number Of Business Unit Total quarterly cash dividends declared (in dollars per share) Dividends Payable, Amount Per Share Proposed Acquisition of Sun Country Airlines Holdings, Inc. Mergers, Acquisitions and Dispositions Disclosures [Text Block] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Federal Income Tax Paid, Federal, after Refund Received All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Interest Costs Capitalized Interest Costs Capitalized Accrued liabilities Accrued Liabilities, Current Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Financing Agreement Financing Agreement [Member] Financing Agreement Non-vested, beginning balance (in shares) Non-vested, ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Contract with Customer, Asset and Liability Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] INVESTING ACTIVITIES: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Station operations Station operations Station operations Includes the fees charged by airports for the use or lease of airport facilities and fees charged by third party vendors for ground handling services, commissary expenses and other related services such as deicing of aircraft. Disposal Group, Disposed of by Sale, Not Discontinued Operations Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Purchases of property and equipment in accrued liabilities and other Purchases Of Property And Equipment In Accrued Liabilities And Other Purchases Of Property And Equipment In Accrued Liabilities And Other Long-term investments Long-Term Investments Debt Instrument, Number Of Tranches Debt Instrument, Number Of Tranches Debt Instrument, Number Of Tranches Debt Instrument, Term Debt Instrument, Term Related Party Transactions [Abstract] Related Party Transactions [Abstract] Effective Income Tax Rate Reconciliation [Table] Effective Income Tax Rate Reconciliation [Table] Property, Plant and Equipment, Useful Life Property, Plant and Equipment, Useful Life Flight Attendants Pilots [Member] Pilots [Member] Effective Income Tax Rate Reconciliation [Line Items] Effective Income Tax Rate Reconciliation [Line Items] Total lease cost Lease, Cost Interest Income (Expense), Operating Interest Income (Expense), Operating Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Schedule of Lease Cost Lease, Cost [Table Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Money market funds Money Market Funds [Member] 2029 Finance Lease, Liability, to be Paid, Year Four Federal Deferred Federal Income Tax Expense (Benefit) Accounts Receivable, before Allowance for Credit Loss, Noncurrent Accounts Receivable, before Allowance for Credit Loss, Noncurrent Equity Components [Axis] Equity Components [Axis] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Allways Rewards Loyalty Program Allways Rewards Loyalty Program [Member] Allways Rewards Loyalty Program Auditor Name Auditor Name Flight equipment Flight Equipment, Gross Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Accelerated Amortization And Disposal Of Software Identified For Redevelopment Accelerated Amortization And Disposal Of Software Identified For Redevelopment [Member] Accelerated Amortization And Disposal Of Software Identified For Redevelopment Number of reportable segments Number of Reportable Segments Employee Benefit Plans Compensation and Employee Benefit Plans [Text Block] Points awarded Points awarded Points awarded CASH PAYMENTS/(RECEIPTS) FOR: Supplemental Cash Flow Information [Abstract] Advertising Cost [Policy Text Block] Advertising Cost [Policy Text Block] Other Performance Measure, Amount Other Performance Measure, Amount Schedule of Contractual Obligation, Fiscal Year Maturity Contractual Obligation, Fiscal Year Maturity [Table Text Block] Debt issuance costs Payments of Debt Issuance Costs Entity Address, State or Province Entity Address, State or Province Collective Bargaining Arrangement [Domain] Collective-Bargaining Arrangement [Domain] Financing cash flows for finance leases Finance Lease, Principal Payments Marketable Securities, Policy [Policy Text Block] Marketable Securities, Policy [Policy Text Block] Exercises of stock options and stock-settled SARs (Shares) StockIssuedDuringPeriodSharesStockOptionsSARsExercised Number of share options (or share units) and cash-settled SARs exercised during the current period. Total cash dividends paid (in thousands) Dividends Debt Instrument, Unused Borrowing Capacity, Amount Debt Instrument, Unused Borrowing Capacity, Amount Deferred major maintenance Increase (Decrease) in Deferred Charges TOTAL CURRENT LIABILITIES Liabilities, Current Amount Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] NET CHANGE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation Co-brand Revenue Co-brand Revenue [Member] Co-brand Revenue [Member] Special charges Special Item - Impairment Charges Special Item - Impairment Charges Maintenance and repairs Aircraft Maintenance, Materials, and Repairs Aircraft Maintenance, Materials, and Repairs Individual: Individual [Axis] Contract with Customer, Liability, Forward Bookings Contract with Customer, Liability, Forward Bookings Contract with Customer, Liability, Forward Bookings Defined contribution plan, cost Defined Contribution Plan, Cost Computer hardware and software Computer Hardware and Software [Member] Computer Hardware and Software [Member] Income Tax Jurisdiction [Domain] Income Tax Jurisdiction [Domain] Cash dividends paid to shareholders Payments of Ordinary Dividends, Common Stock Document Annual Report Document Annual Report Proceeds from Sunseeker construction financing account Proceeds From financing disbursements And Deposits Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount Net cash provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] 2026 Purchase Obligation, to be Paid, Year One Interest paid, net of amount capitalized Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Basis of Presentation [Policy Text Block] Basis of Accounting, Policy [Policy Text Block] Lender Name [Axis] Lender Name [Axis] Accrued Retention Bonus, Current Payment Percentage Accrued Retention Bonus, Current Payment Percentage Accrued Retention Bonus, Current Payment Percentage Operating lease right-of-use assets, net Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Principal payments on debt and finance lease obligations Repayments of Long-Term Debt Effective Income Tax Rate Reconciliation, Percent Effective Income Tax Rate Reconciliation, Percent Entity Interactive Data Current Entity Interactive Data Current Operating lease cost Operating Lease, Cost Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Less: valuation allowance Deferred Tax Assets, Valuation Allowance Equity [Abstract] Equity [Abstract] Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount Buildings and leasehold improvements Building [Member] Total purchase commitments Purchase Obligation Segments Segment Reporting Disclosure [Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Current maturities of long-term debt and finance lease obligations (including $13,307 and $12,787 from VIEs, Note 6), net of related costs of $4,245 and $8,287 Long-term debt and lease obligation, current Long-Term Debt and Lease Obligation, Current Net operating loss Deferred Tax Assets, Operating Loss Carryforwards Federal Current Federal Tax Expense (Benefit) Debt and Lease Obligation Debt and Lease Obligation Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Other Commitments [Line Items] Other Commitments [Line Items] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] 2027 Finance Lease, Liability, to be Paid, Year Two Schedule of Lease-related Asset and Liabilities Schedule Of Lease-related Asset And Liabilities [Table Text Block] Schedule Of Lease-related Asset And Liabilities Lessee, Leases [Policy Text Block] Lessee, Leases [Policy Text Block] Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share Total (in thousands) Stock Repurchased During Period, Value Payments to Acquire Productive Assets Payments to Acquire Productive Assets Tax receivable Increase (Decrease) in Income Taxes Receivable Senior Secured Notes Due 2027 Senior Secured Notes Due 2027 [Member] Senior Secured Notes Due 2027 Deposits and other assets Other Assets, Noncurrent Entity Central Index Key Entity Central Index Key Other property and equipment Property, Plant and Equipment, Other, Gross Deposits and Other Assets Deposits and Other Assets [Policy Text Block] Deposits and Other Assets PEO Name PEO Name Schedule of Maturities of Long-term Debt Schedule of Maturities of Long-Term Debt [Table Text Block] Total operating revenues Revenues Revenues Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] 2027 Purchase Obligation, to be Paid, Year Two Internal-use Software Restructuring Cost Internal-use Software Restructuring Cost [Member] Internal-use Software Restructuring Cost Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Revolving Credit Facility Revolving Credit Facility [Member] State State and Local Income Tax Expense (Benefit), Continuing Operations Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Total lease obligations Total lease obligations Finance Lease, Liability Arrangement Duration Trading Arrangement Duration Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Sunseeker Resort (1) Sunseeker Resorts [Member] Sunseeker Resorts [Member] Air traffic liability Contract with Customer, Liability, Current Segments [Axis] Segments [Axis] Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Class of Stock [Domain] Class of Stock [Domain] Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Collective Bargaining Arrangement [Axis] Collective-Bargaining Arrangement [Axis] Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Long-Lived Asset, Held-for-Sale [Table] Long-Lived Asset, Held-for-Sale [Table] Other investing activities Payment for (Proceeds from) Other Investing Activity Other adjustments Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item Thereafter Long-Term Debt, Maturity, after Year Five Debt issuance cost, gross, noncurrent Debt Issuance Cost, Gross, Noncurrent Disposal Group, Including Discontinued Operation, Consideration Disposal Group, Including Discontinued Operation, Consideration Foreign Foreign Income Tax Expense (Benefit), Continuing Operations Fair Value Option, Disclosures [Table] Fair Value Option, Disclosures [Table] Proceeds from Issuance of Unsecured Debt Proceeds from Issuance of Unsecured Debt Long-term Debt, Excluding Current Maturities Long-Term Debt, Excluding Current Maturities Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Shares held in employee stock option plan, allocated Shares Held in Employee Stock Option Plan, Allocated Debt Instrument [Axis] Debt Instrument [Axis] Forfeited, weighted average grant date fair value (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Fair Value Measurements Fair Value Disclosures [Text Block] Business Combination [Line Items] Business Combination [Line Items] Credit Facility [Domain] Credit Facility [Domain] SHAREHOLDERS' EQUITY Equity, Attributable to Parent [Abstract] Executive Officer Executive Officer [Member] Aircraft lease rentals Aircraft Lease Rental Aircraft Lease Rental Aircraft Lease Rental Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Entity Address, Address Line One Entity Address, Address Line One Treasury Stock, Value, Acquired, Cost Method Treasury Stock, Value, Acquired, Cost Method Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Investment, Name [Axis] Investment, Name [Axis] Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Finance Leased Assets, Number Of Units Finance Leased Assets, Number Of Units Finance Leased Assets, Number Of Units Noncurrent operating lease liabilities Operating Lease, Liability, Noncurrent Entity Voluntary Filers Entity Voluntary Filers Impaired Long-Lived Assets Held and Used, Asset Name [Domain] Impaired Long-Lived Assets Held and Used, Asset Name [Domain] Expendable parts, supplies and fuel, reserve Expendable parts, supplies and fuel, reserve Expendable parts, supplies and fuel, reserve Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Special charges, net of recoveries Sunseeker impairment Total special charges Restructuring, Settlement and Impairment Provisions Fair Value as of Grant Date Award Grant Date Fair Value Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Entity Registrant Name Entity Registrant Name operating right of use asset, net operating right of use asset, net operating right of use asset, net Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Municipal debt securities Municipal Bonds [Member] Capitalized Computer Software, Amortization Capitalized Computer Software, Amortization Salaries and benefits Labor and Related Expense Labor and Related Expense Accrued pilot retention bonus Accrued Retention Bonus Accrued Retention Bonus Dilutive effect of stock options and restricted stock (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Accrued Retention Bonus, Employee Exception Percentage Accrued Retention Bonus, Employee Exception Percentage Accrued Retention Bonus, Employee Exception Percentage Insurance proceeds from damage to property & equipment Insurance Proceeds From Sale Of Property, Plant, And Equipment Insurance Proceeds From Sale Of Property, Plant, And Equipment Title and Position [Domain] Title and Position [Domain] Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Other Secured Debt Other Secured Debt [Member] Other Secured Debt Deferred income taxes Deferred Income Taxes and Tax Credits Estimated Fair Value Long-Term Debt, Fair Value Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Number of operating segments Number of Operating Segments 2027 Lessee, Operating Lease, Liability, to be Paid, Year Two Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Stockholders' Equity Note, Stock Split, Conversion Ratio Stockholders' Equity Note, Stock Split, Conversion Ratio Leases, Operating [Abstract] Leases, Operating [Abstract] Debt Instrument, Convertible, Liquidation Preference, Value Debt Instrument, Convertible, Liquidation Preference, Value Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Summary of Long-Term Debt Schedule of Debt [Table Text Block] Restricted Stock, Stock Options, Cash-Settled SARs And Employee Stock Purchase Program Restricted Stock, Stock Options, Cash-Settled SARs And Employee Stock Purchase Program [Member] Restricted Stock, Stock Options, Cash-Settled SARs And Employee Stock Purchase Program Number Of Points Earned For Every Dollar Spent Over Five Hundred Dollars Number Of Points Earned For Every Dollar Spent Over Five Hundred Dollars Number Of Points Earned For Every Dollar Spent Over Five Hundred Dollars Granted, weighted average grant date fair value (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Accrued Retention Bonus, Minimum Pay Credit Hours Per Month Accrued Retention Bonus, Minimum Pay Credit Hours Per Month Accrued Retention Bonus, Minimum Pay Credit Hours Per Month Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount A320 Series Engine A320 Series Engine [Domain] A320 Series Engine [Domain] Restatement Determination Date: Restatement Determination Date [Axis] Number of full-time equivalent employee Number Of Full-time Equivalent Employee Number Of Full-time Equivalent Employee Impairment of Long-Lived Assets to be Disposed of Impairment of Long-Lived Assets to be Disposed of Non-PEO NEO Non-PEO NEO [Member] Restructuring and Related Costs Restructuring and Related Costs [Table Text Block] Stock Issued During Period, Value, Employee Stock Purchase Plan Stock Issued During Period, Value, Employee Stock Purchase Plan Other financing activities Proceeds from (Payment for) Other Financing Activity Interest income Interest Income, Other Debt Instrument, Fair Value Disclosure Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] Name Trading Arrangement, Individual Name Award Type [Domain] Award Type [Domain] 2026 Lessee, Operating Lease, Liability, to be Paid, Year One Proceeds from loan receivable Payments for (Proceeds from) Loans Receivable Employees Under Collective Bargaining Agreements Employees Under Collective Bargaining Agreements [Table Text Block] [Table Text Block] for Employees Under Collective Bargaining Agreements [Table] Equity Awards Adjustments Equity Awards Adjustments [Member] Advertising Expense Advertising Expense Deferred Credits and Other Liabilities Deferred Credits and Other Liabilities Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Total Right-of-Use Asset Total Right-of-Use Asset Total Right-of-Use Asset Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Debt Instrument, Face Amount Debt Instrument, Face Amount Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Certificates of deposit Certificates of Deposit [Member] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Unusual or Infrequent Item, or Both [Line Items] Unusual or Infrequent Item, or Both [Line Items] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Aircraft Maintenance And Repair Costs Aircraft Maintenance And Repair Costs [Policy Text Block] Aircraft Maintenance And Repair Costs Name Awards Close in Time to MNPI Disclosures, Individual Name Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Non-vested, beginning balance, weighted average grant date fair value (in dollars per share) Non-vested, ending balance, weighted average grant date fair value (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Restructuring Type [Axis] Restructuring Type [Axis] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Defined contribution plan, employer matching contribution, percent of employees' gross pay Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Total Total Percentage of Employees [Member] Total Percentage of Employees under collective bargaining agreements Weighted-average fair value of discount under the ESPP Aggregate Cost Of Discount Off Market Value For Shares Available Under Employee Stock Purchase Plan This element represents the value of the discount applied to the market value for shares available to participating employees under the employee stock purchase plan. Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] APIC, Share-based Payment Arrangement, Increase for Cost Recognition APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Treasury shares, at cost, 7,181,391 and 7,172,646 shares at December 31, 2025 and 2024, respectively Treasury Stock, Value Sunseeker Weather Events Sunseeker Weather Events [Member] Sunseeker Weather Events Accumulated other comprehensive income, net Accumulated Other Comprehensive Income (Loss), Net of Tax Long-term debt and finance lease obligations (including $81,642 and $94,950 from VIEs, Note 6), net of current maturities and related costs of $12,404 and $8,842 Long-term debt and lease obligation Long-Term Debt and Lease Obligation Sales and marketing Selling and Marketing Expense Selling and Marketing Expense Points redeemed Points redeemed Points redeemed Proceeds from (Repayments of) Debt Proceeds from (Repayments of) Debt 2026 Long-Term Debt, Maturity, Year One Financial Instruments [Domain] Financial Instruments [Domain] Change in available-for-sale securities, net of tax OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Total deferred tax liabilities Deferred Tax Liabilities, Gross Auditor Firm ID Auditor Firm ID Segments [Domain] Segments [Domain] 2030 Long-Term Debt, Maturity, Year Five Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Postemployment Benefits [Abstract] Postemployment Benefits [Abstract] Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Line of Credit, Current Line of Credit, Current Minimum Minimum [Member] Less accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Amortization of Other Deferred Charges Amortization of Other Deferred Charges Earnings Per Share, Policy [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] Company Selected Measure Name Company Selected Measure Name Revenue [Policy Text Block] Revenue [Policy Text Block] Senior Notes Senior Notes [Member] Purchase of investment securities Payments to Acquire Debt Securities, Available-for-Sale Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable, Current Operating cash flows for operating leases Operating Lease, Payments Audit Information [Abstract] Audit Information [Abstract] Audit Information Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Net income (loss) attributable to common stock Net Income (Loss) Available to Common Stockholders, Diluted All Executive Categories All Executive Categories [Member] Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Common stock, par value $0.001, 100,000,000 shares authorized; 25,559,128 and 25,580,445 shares issued; 18,377,737 and 18,407,799 shares outstanding at December 31 2025 and 2024, respectively Common Stock, Value, Issued Common Stock, Value, Issued Foreign Current Foreign Tax Expense (Benefit) Finance Lease, Right-of-Use Asset Finance Lease, Right-of-Use Asset, after Accumulated Amortization Less income allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Short-term investments Short-Term Investments Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Title and Position [Axis] Title and Position [Axis] Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Airline Arline [Member] Arline Business Combination [Axis] Business Combination [Axis] TOTAL COMPREHENSIVE INCOME (LOSS) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Entity Small Business Entity Small Business Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Schedule of Nonvested Phantom Stock Awards Schedule of Nonvested Share Activity [Table Text Block] Senior Secured Revolving Loan Facility Senior Secured Revolving Loan Facility [Member] Senior Secured Revolving Loan Facility Other Other Cost and Expense, Operating Other Cost and Expense, Operating Long-term Long Term Investments [Member] -- None. No documentation exists for this element. -- Shares used for computation: Weighted average shares outstanding used in computing earnings per share to common stockholders: [Abstract] -- None. No documentation exists for this element. -- State Current State and Local Tax Expense (Benefit) Long-Term Debt Long-Term Debt [Text Block] Document Transition Report Document Transition Report Short-term Short-Term Investments [Member] Equity Method Investment, Ownership Percentage Equity Method Investment, Ownership Percentage Long-term Debt Long-Term Debt [Member] Total lease payments Finance Lease, Liability, to be Paid Underlying Securities Award Underlying Securities Amount Operating Leased Assets, Number Of Units Operating Leased Assets, Number Of Units Operating Leased Assets, Number Of Units Equity Component Equity Component [Domain] Other Nonoperating Expense Other Nonoperating Expense Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount CashAndCashEquivalents_ [Domain] Cash and Cash Equivalents [Domain] Income Taxes Income Tax Disclosure [Text Block] Proceeds from Lines of Credit Proceeds from Lines of Credit Accounts Receivable, Allowance for Credit Loss Accounts Receivable, Allowance for Credit Loss Revenue from Contract with Customer, Duration Revenue, Performance Obligation, Description of Timing Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Aircraft pre-delivery deposits Aircraft Pre-delivery Deposits Aircraft Pre-delivery Deposits Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Third party products Third party products Revenue generated from third party products through the sale of hotel rooms, ground transportation (rental cars and hotel shuttle products), attraction and show tickets and fees we receive from other merchants selling products through our website, net of amounts paid or payable to wholesale providers, travel agent commissions and credit card processing fees associated with sale of third party products. Scenario [Axis] Scenario [Axis] Rooms Rooms [Member] Rooms Average price per share (in dollars per share) Shares Acquired, Average Cost Per Share Barclays Bank PLC Barclays Bank PLC [Member] Barclays Bank PLC Document Type Document Type Fair Value, Inputs, Level 3 Fair Value, Inputs, Level 3 [Member] Name Outstanding Recovery, Individual Name Additional paid-in capital Additional Paid in Capital Product and Service [Axis] Product and Service [Axis] Notes Payable Notes Payable Variable lease cost(1) Variable Lease, Cost Passenger Revenue from Contract with Customer, Excluding Assessed Tax Revenue from Contract with Customer, Excluding Assessed Tax All Individuals All Individuals [Member] Flight Dispatchers Flight Dispatchers [Member] Flight Dispatchers [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Purchase of property and equipment, including capitalized interest Payments to Acquire Property, Plant, and Equipment Name Forgone Recovery, Individual Name TOTAL CURRENT ASSETS Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Food and Beverage Food and Beverage [Member] Interest Cost [Abstract] Interest Cost [Abstract] Interest Cost [Abstract] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Disposal Group Name [Axis] Disposal Group Name [Axis] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Operating Leased Assets, Number Of Units Removed Operating Leased Assets, Number Of Units Removed Operating Leased Assets, Number Of Units Removed Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Total deferred Deferred Total Income Tax Expense Benefit The component of income tax expense for the period comprised of the increase (decrease) in the entity’s total deferred tax assets and liabilities attributable to continuing operations as determined by applying the provisions of the applicable enacted tax laws. CURRENT LIABILITIES Liabilities, Current [Abstract] Total operating expenses Total operating expenses Operating Expenses Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Level 1 Fair Value, Inputs, Level 1 [Member] Long-Term Line of Credit Long-Term Line of Credit Tax credits Deferred Tax Assets, Tax Credit Carryforwards Diluted (in dollars per share) Earnings Per Share, Diluted Forecast Forecast [Member] Adjusted weighted-average shares outstanding under two-class method (in shares) Two-Class Method, Weighted Average Number of Shares Outstanding, Diluted Two-Class Method, Weighted Average Number of Shares Outstanding, Diluted Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Title of 12(b) Security Title of 12(b) Security Pilots Flight Attendants [Member] Flight Attendants [Member] Sun Country Sun Country [Member] Sun Country Treasury stock, common, shares (in shares) Treasury Stock, Common, Shares State Income Tax Paid, State and Local, after Refund Received 2030 Lessee, Operating Lease, Liability, to be Paid, Year Five Total other expenses Nonoperating Income (Expense) Flight Attendant Ratification Bonus Flight Attendant Ratification Bonus [Member] Flight Attendant Ratification Bonus Auditor Location Auditor Location Other comprehensive income: Other comprehensive income (loss): [Abstract] -- None. No documentation exists for this element. -- Unusual or Infrequent Item, or Both [Table] Unusual or Infrequent Item, or Both [Table] Accrued pilot retention bonus Increase (Decrease) In Accrued Retention Bonus Increase (Decrease) In Accrued Retention Bonus Preopening Expenses Policy Preopening Expenses Policy [Policy Text Block] Preopening Expenses Policy (Gain) loss on aircraft and other equipment disposals Loss on aircraft and other equipment disposals The gain or (loss) on the sale or retirement of aircraft and aircraft equipment, including the impairment of engine values held for sale in consignment. Air traffic liability Increase (Decrease) in Contract with Customer, Liability Domestic Tax Jurisdiction Domestic Tax Jurisdiction [Member] Air-related revenue Air-related revenue [Member] Air-related revenue [Member] Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Cash Paid Per Acquiree Share Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Cash Paid Per Acquiree Share Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Cash Paid Per Acquiree Share Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent Income tax paid (refunds) Income tax paid (refunds) Income Taxes Paid, Net Stock Repurchased During Period, Shares Treasury Stock, Shares, Acquired Thereafter Finance Lease, Liability, to be Paid, after Year Five Cash equivalents Cash Equivalents [Member] Award Timing Disclosures [Line Items] Less income allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted Entity Well Known Seasoned Issuer Entity Well-known Seasoned Issuer Measurement Frequency [Domain] Measurement Frequency [Domain] Property and Equipment Property, Plant and Equipment Disclosure [Text Block] Total lease payments Lessee, Operating Lease, Liability, to be Paid Unrealized gain on short-term investments, net of tax OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Stockholders' Equity Equity [Text Block] State Deferred State and Local Income Tax Expense (Benefit) Noncurrent loyalty program liability Loyalty Program Liability, Noncurrent Loyalty Program Liability, Noncurrent Consolidated Variable Interest Entities Due 2029 Consolidated Variable Interest Entities Due 2029 [Member] Consolidated Variable Interest Entities Due 2029 Net income (loss) Net Income (Loss) Attributable to Parent Average price paid per share (in dollars per share) Weighted Average Fair Value Of Stock Purchase Right Under Employee Stock Purchase Plan This element represents the weighted average fair value of each purchase right under the employee stock purchase plan. Expiration Date Trading Arrangement Expiration Date Restructuring, Impairment, and Other Activities Disclosure [Text Block] Restructuring, Impairment, and Other Activities Disclosure [Text Block] Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Property and equipment (including $101,712 and $107,290 from VIEs, Note 6), net of accumulated depreciation of $1,178,315 and $1,067,194 Property, plant and equipment, net Property and equipment, net Property, Plant and Equipment, Net Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Airline special charges Restructuring Charges Shares Acquired, Weighted Average Discount to Net Assets, Percentage Shares Acquired, Weighted Average Discount to Net Assets, Percentage Repurchase of common stock Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Effective Income Tax Rate Reconciliation, Unrecognized Tax Benefits, Amount Effective Income Tax Rate Reconciliation, Unrecognized Tax Benefits, Amount Effective Income Tax Rate Reconciliation, Unrecognized Tax Benefits, Amount Long-Lived Assets Held-for-Sale [Line Items] Long-Lived Assets Held-for-Sale [Line Items] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Prepaid expenses Deferred Tax Liabilities, Prepaid Expenses Accounts receivable Increase (Decrease) in Accounts Receivable Inventory, Policy [Policy Text Block] Inventory, Policy [Policy Text Block] Entity Current Reporting Status Entity Current Reporting Status Third Party Product Revenue Third Party Product Revenue [Member] Third Party Product Revenue Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Unsecured Credit Facility Unsecured Credit Facility [Member] Unsecured Credit Facility OPERATING INCOME (LOSS) Operating Income (Loss) Operating Income (Loss) Consolidated Entities [Domain] Consolidated Entities [Domain] Retained earnings Retained Earnings (Accumulated Deficit) Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Schedule of Class of Treasury Stock Class of Treasury Stock [Table Text Block] Expendable parts, supplies and fuel, net of reserve of $14,691 and $12,597 Expendable parts, supplies and fuel, net of allowance Net amount, as of the balance sheet date, of expendable parts, supplies and fuel to be used in air transport of passengers. Financial Instrument [Axis] Financial Instrument [Axis] Deferred Compensation Share-Based Arrangements, Liability, Current and Noncurrent Deferred Compensation Share-Based Arrangements, Liability, Current and Noncurrent Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Executive Category: Executive Category [Axis] Debt Instrument, Liquidation Requirement, Interest Percentage Debt Instrument, Liquidation Requirement, Interest Percentage Debt Instrument, Liquidation Requirement, Interest Percentage Aircraft fuel Aircraft Fuel Aircraft Fuel Aircraft Fuel Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Percent Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Percent Repayments of Debt Repayments of Debt LONG-TERM DEBT AND OTHER NONCURRENT LIABILITIES Long-term debt and other long-term liabilities: [Abstract] -- None. No documentation exists for this element. -- Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Fixed Rate Fixed Rate [Member] Fixed Rate [Member] Finance Lease, Liability, Current Less current obligations Finance Lease, Liability, Current Interest expense Interest Expense, Operating and Nonoperating Inventory Valuation Reserves Inventory Valuation Reserves Proceeds from the issuance of debt and finance lease obligations Proceeds from Issuance of Long-Term Debt Class of Stock [Axis] Class of Stock [Axis] Current Fiscal Year End Date Current Fiscal Year End Date Defined contribution plan, maximum annual contribution per employee, percent Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity Schedule of Share-Based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Debt issuance costs, gross, current Debt Issuance Costs, Gross, Current Other Deferred Tax Liabilities, Other Aircraft Type [Axis] Aircraft Type [Axis] Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Other, net Other Nonoperating Income (Expense) Statement [Table] Statement [Table] Adjustments to reconcile net loss to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] FINANCING ACTIVITIES: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Concentration risk, percentage Concentration Risk, Percentage Concentration Risk, Percentage Foreign Tax Jurisdiction, Other Foreign Tax Jurisdiction, Other [Member] Total Lease Liability Total Lease Liability Total Lease Liability Fixed fee contracts Fixed fee contract revenue Revenue generated from fixed fee agreements and charter service on a seasonal and ad-hoc basis. Accounts receivable Receivables, Net, Current Contract with Customer, Liability Contract with Customer, Liability Long-term lease obligations Finance Lease, Liability, Noncurrent Organization and Business of Company Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Share-based compensation arrangement by share-based payment award, number of shares authorized Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized 2027 Long-Term Debt, Maturity, Year Two Professional Services Restructuring Cost Professional Services Restructuring Cost [Member] Professional Services Restructuring Cost Other Commitments [Table] Other Commitments [Table] Leases Lessee, Operating Leases [Text Block] Termination Date Trading Arrangement Termination Date Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Operating Lease, Weighted Average Discount Rate, Percent Operating Lease, Weighted Average Discount Rate, Percent Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Scheduled Service Revenue Scheduled Service Revenue [Member] Scheduled Service Revenue [Member] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Assets Measured at Fair Value On a Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Share Repurchase Program, Remaining Authorized, Amount Share Repurchase Program, Remaining Authorized, Amount Disposal Group Classification [Domain] Disposal Group Classification [Domain] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Employee Stock Purchase Plan, Extension Period Employee Stock Purchase Plan, Extension Period Employee Stock Purchase Plan, Extension Period Effective Income Tax Rate Reconciliation, Unrecognized Tax Benefits, Percent Effective Income Tax Rate Reconciliation, Unrecognized Tax Benefits, Percent Effective Income Tax Rate Reconciliation, Unrecognized Tax Benefits, Percent Sunseeker weather events, net of insurance recoveries(1) Restructuring Charges, Net Of Recoveries Restructuring Charges, Net Of Recoveries Segment Reporting [Abstract] Segment Reporting [Abstract] Current loyalty program liability Loyalty Program Liability, Current Loyalty Program Liability, Current Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Construction Loan Agreement Due 2032 Construction Loan Agreement Due 2032 [Member] Construction Loan Agreement Due 2032 Debt Disclosure [Abstract] Debt Disclosure [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Entity Tax Identification Number Entity Tax Identification Number Scenario [Domain] Scenario [Domain] Dividends, Cash Dividends, Cash Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount SUPPLEMENTAL DISCLOSURE OF NONCASH TRANSACTIONS Non- cash transactions: [Abstract] -- None. No documentation exists for this element. -- Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common stock, par or stated value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Consolidated Entities [Axis] Consolidated Entities [Axis] Employee benefits Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits Organizational Restructuring Organizational Restructuring [Member] Organizational Restructuring Common stock, shares, issued (in shares) Common Stock, Shares, Issued Allegiant Travel Company Allegiant Travel Company [Member] Allegiant Travel Company Net income (loss) attributable to common stock Net income attributable to common stock (in Dollars) The portion of profit or loss for the period, net of income taxes, which is attributable to the parent, and if applicable, reduced by earnings allocated (not distributed) to participating securities under the two-class method to the extent that participating securities may share in earnings as if all of the earnings for the period had been distributed. Operating Lease, Weighted Average Remaining Lease Term Operating Lease, Weighted Average Remaining Lease Term 2029 Long-Term Debt, Maturity, Year Four Asset Impairment Charges, Offset Adjustment Asset Impairment Charges, Offset Adjustment Asset Impairment Charges, Offset Adjustment Operating cash flows for finance leases Finance Lease, Interest Payment on Liability Airbus A320 Aircraft Series Airbus A320 Aircraft Series [Member] -- None. No documentation exists for this element. -- Entity Public Float Entity Public Float Interest expense Interest Expense, Nonoperating Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Insider Trading Arrangements [Line Items] Security Exchange Name Security Exchange Name Foreign Income Tax Paid, Foreign, after Refund Received Revolving Credit Facilities Due 2027 Revolving Credit Facilities Due 2027 [Member] Revolving Credit Facilities Due 2027 Product and Service, Other Product and Service, Other [Member] TOTAL LIABILITIES: Liabilities Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Capitalized Computer Software, Net Capitalized Computer Software, Net 2030 Finance Lease, Liability, to be Paid, Year Five Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Long-term debt Non-Publicly Held Debt [Member] Non-Publicly Held Debt [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Shares repurchased (in shares) Stock Repurchased During Period, Shares Proceeds from maturities of investment securities Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale OPERATING EXPENSES: Operating Expenses [Abstract] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration Phantom Share Units (PSUs) Phantom Share Units (PSUs) [Member] Fair Value by Asset Class [Domain] Asset Class [Domain] Equipment Equipment And Leasehold Improvements [Member] -- None. No documentation exists for this element. -- Variable Rate Variable Rate [Member] Variable Rate [Member] Statement [Line Items] Statement [Line Items] Schedule of Future Minimum Payments of Lease Liabilities Schedule Of Future Minimum Payments Of Lease Liabilities [Table Text Block] Schedule Of Future Minimum Payments Of Lease Liabilities Number Of Points Earned For Every Dollar Spent Number Of Points Earned For Every Dollar Spent Number Of Points Earned For Every Dollar Spent Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and Cash Equivalent Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Common Stock Common Stock [Member] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Debt Securities, Available-for-Sale Debt Securities, Available-for-Sale Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Corporate debt securities Corporate Debt Securities [Member]